thx for the interesting responses guys, just the stuff i was after

Chrome, they're exactly the opportunities Im looking for, to back & lay the same horse with the adv in your favour.

the bread & butter will still have to be some form study though, i have an idea of a 'type' of horse to lay when they are in the market.

but this leads me to a new question:

are certain types of races good races to lay in?? think the G1 1400m hcp at Caul on sat, big field, looked an open race on paper (I would have layed Bon Hoffa ftr, I backed Niconero). Big fields, open races

or is it best to lay an individual horse for handicapping reasons? (lacks pace, gets back, ? on pace, not suited at Caul, ? on jock, under odds, etc)